public class TV {

    private int channel = 0;

    public void turnOn() {
        System.out.println("The TV is turn on!");
    }

    public void turnOff() {
        System.out.println("The TV is turn off!");
    }

    public void changeChannel(int changeChannel) {
        this.channel = changeChannel;
        System.out.println("The TV change channel: " + channel);
    }
}
